| 617 Patroclus (A906 UL) |
| Classification: Jupiter Trojan SPK-ID: 2000617 |
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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 59 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1389665604832871 | 9.327e-09 | |
| a | 5.214559560207737 | 5.9051e-08 | au |
| q | 4.489910153690426 | 9.1048e-08 | au |
| i | 22.0517763307761 | 2.4129e-07 | deg |
| node | 44.34841429339916 | 1.7421e-06 | deg |
| peri | 307.8660818490041 | 5.4786e-06 | deg |
| M | 237.0071671908755 | 6.6602e-06 | deg |
| tp | 2460486.443097644020
(2024-Jun-24.94309764) | 0.00010283 | TDB |
| period | 4349.355185452411
11.91 | 7.388e-05
2.023e-07 | d
yr |
| n | .0827708900859872 | 1.406e-09 | deg/d |
| Q | 5.939208966725047 | 6.7257e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.2 |
|
n/a |
MPO492756 |
IRAS observations used: 8 |
| diameter |
diameter |
140.362 |
km |
0.868 |
urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G) |
|
| rotation period |
rot_per |
102.8 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Marchis, F.; Hestroffer, D.; Descamps, P.; Berthier, J.; et al. (2006) Nature 439, 565-567.]
[Mueller, M.; Marchis, F.; Emery, J.P.; Harris, A.W. (DLR); et al. (2010) Icarus 205, 505-515.]
[Oey, J. (2012) Minor Planet Bull. 39, 106-107.]
[Stephens, R.D.; Warner, B.D. (2018) Minor Planet Bull. 45, 343-347.] |
| geometric albedo |
albedo |
0.047 |
|
0.003 |
urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G) |
|
| B-V |
BV |
0.677 |
|
0.013 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=5; phase (min.=2.24, mean=6.14, max.=8.61) deg. |
| U-B |
UB |
0.215 |
|
0.045 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=7; phase (min.=2.24, mean=6.52, max.=8.61) deg. |
| Tholen spectral type |
spec_T |
P |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
|
| 617 Patroclus (A906 UL) Discovered 1906-Oct-17 by Kopff, A. at Heidelberg |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| A906 UL = 1941 XC = 1962 NB |
|
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